Mortising tool for faceplates



y 1960 E. L. SCHLAGE 2,938,554

MORTISING TOOL FOR FACEPLATES Filed March 13, 1959 FIG I United StatesFatent O l MORTISING TOOL FOR FACEPLATES Ernest L. Schlage, Burlingame,Calih, assignor to Schlage Lock Company, a corporation Filed Mar. 13,19515. No. 199,131,

Claims. Cl. 145-25 This invention relates to a mortising tool adapted tobe used in forming a shallow mortise in the edge of a door in which isreceived the faceplate of a latch or lock unit.

In the installation of modern cylindrical and tubular locks a hole isbored in the door from the edge parallel to the opposite faces of thedoor for the purpose of receiving therein the latch housing. Arectangular faceplate is then secured by screws to said edge so that thelatch bolt projects therethrough. By the present invention a tool isprovided for defining and partially forming the shallow rectangularrecess or mortise within which the faceplate is received. Said mortiseis located, by means of the tool herein disclosed, in its correctposition relative to said bore.

Heretofore, various tools have been provided for cating and forming thefaceplate mortise. One example of such prior art tools is disclosed inQuigley Patent No. 2,422,367, dated June 17, 1947. I

The main object of the present invention is the provision of a morerugged and accurate tool than has heretofore been provided.

Another object 'of the invention is the provision of a mortising toolwhich incorporates marking means for marking the proper location of thescrews which secure the faceplateto the door; In this connection it willbe understood that if the carpenter drills holes in the door edge forthe faceplate screws and said holes arenot properly located relativeto'the faceplate mortise some difiiculties may be encountered inproperly positioning the faceplate. For example, the faceplate may notbe guided into the mortise when the screws are tightened or the screwsmay be cocked relative tot he faceplate 'resulting in the sharp edges ofthe countersunk screws projecting beyond the outer surface of thefaceplate.

Still another object of the invention is the provision of a mortisingtool in which the portion of the tool which enters the latch housingbore to guide the cutters to the proper positions on the door edge isintegral with the body of the tool thus enhancing the accuracy of thetool.

Yet another object of the invention is to simplify the construction ofthe mortising tool and reduce the number of parts thereof byincorporating the screw hole marking means with the cutter securingmeans.

Other objects and advantages will be seen in the following specificationand in the drawings wherein:

Fig. l is a vertical fragmentary section through a door showing the toolin section.

Fig. 2 is a fragmentary perspective of a door showing the here whichreceives the guide portion of the tool therein.

Fig. 3 is a perspective of the tool.

Fig. 4 is an exploded perspective of the various portions of the tool intheir proper relative positions.

In detail, and with reference first to Figs. 1 and 2, the invention isadapted to be used on a door generally designated 1 having an edge 2 inwhich a bore 3 is formed 2,938,554 Patented May .31, 1960 ice forreceiving therein the latch unit, not shown. A larger bore 4 (Fig. 1) isalso formed in the door extending between the opposite faces 5 forreceiving therein the latch actuating mechanism which is not involved inthe present invention.

The tool comprises a body generally designated 7 which includes arelatively heavy rectangular portion 8. Projecting from one side ofportion 8 and integral therewith is a guide member 9 which iscylindrical in form to be snugly but slidably received in bore 3.Preferably said guide member is cut away to provide a pair of verticallyextending flat faces 10, 11 (Fig. 4) for 'a purpose to be described.

Projecting from the opposite side of the rectangular portion .8 of body7 is an elongated generally cylindrical handle portion 14 provided witha flat axially outwardly directed face 15 (Fig. 1) which is adapted tobe struck by a hammer while the'handle 14 is held by the user.

A pair of channel shaped cutter members generally designated 17, 18 areadapted to be secured against the axially directed face 19 of therectangular body portion 8. Cutter 17 is provided with a pair ofvertically extending flanges 20, 21 connected with a web 22. In asomewhat similar manner, cutter 18 is provided with a pair ofhorizontally extending flanges 24, 25 connected by a web 26. Flanges 20,21 of cutter 17 are slightly narrower than flanges 24, 25 of cutter 18so that when said cutters are placed together with their webs inengagement as shown in Fig. 3 the cutting edges formed on the flanges ofboth cutters are all coplanar and form a rectangular cutting framearound boss 9.

To permit said cutters to pass over guide member 9 thewebs 22, 26 areprovided with central openings 28, 29 respectively which arecomplementary in shape to guide 9. It will be noted that the verticallyextending straight edges 31, 32 of opening 28 and the verticallyextending straight edges 33, 34 of opening 29 are positioned alongsidethe vertically extending flat faces 10, 11 of guide 9 thus insuring thatthe cutting edges of one cutter are exactly perpendicular to the cuttingedges of the other cutter.

. For the purpose of securing the cutters 17, 18 to the rectangularportion 8 of body 7 the latter is provided with a pair of axiallyextending holes 37, 38 adapted to receive therein sleeves 39, 40 (Fig.4). Cutter 17 is provided with corresponding holes 41, 42 and cutter 18is provided with holes 43, 44 also for receiving sleeves 39, 40therethrough.

Sleeves 39, 40 are provided with annular flanges 45, 46 respectivelywhich engage the web 22 of the outer cutter 17 when the various partsare assembled as shown in Fig. 3. Said sleeves 39, 40 are internallythreaded for threadedly receiving therein screws 49, 50 (Fig. 4).

Rectangular portion 8 of the body 7 is provided with a pair of enlargedbores 51, 52 (Fig. l) in extension of bores 37, 38 so as to receivetherein the heads 53, 54 of screws 49, 50 respectively.

Screws 49, 50 are formed at their ends to provide points or markers 57,58 which are adapted to mark the proper position of the screws whichsecure the faceplate to the door.

As best seen in Fig. 1 the length of holes 37, 38 and the length ofsleeves 39, 40 and screws 49, 50 are predetermined to when said screwsare tightened the points 57, 58 are substantially coplanar with theplane of the cutting edges of cutters 17, 18 so that the operations ofcutting the mortise and embedding the markers in the door edge areperformed simultaneously.

In operation the guide 9 of the assembled tool is inserted in bore 3 ofthe door with the cutting edges of cutter 17 vertical and, of course,parallel to the opposite faces 5 of the door. When the cutting edgm areThe vertical cutting flanges 20, 21 are thus embedded'in the door toform cuts 60, 61 and the flanges 24, 25 form cuts 62, 63. At thesame-time, points 57, 58-form indentations 64, 65;, 1 i. i 7 i 7 It isthen a simple matter for the carpenter to drill the two holes forreceiving the faceplate screwsfand to chisel out' the shallow mortise"defined by lines 60, A

61, 62, 63 to receive the faceplate. g

It will be noted that thecutting edges do not actually intersect eachother but terminate short of each other. It is a simple matter, however,for the carpenter to complete the rectangular cut with his chisel.

The above described tool is relatively inexpensive to make and isfoolproof in operation. In additiongthe cutters are easily removedandrepla'ced when it becomes necessary to sharpen theme Theabovedetaileddescriptionof the preferred form of the invention is not tobe taken as restrictive thereof as it is obviousthat variousmodifications in design may be resorted to withoutdeparting from thespirit of the invention as defined in the following claims.

I claim: a g

1. A mortising tool for use in installing a faceplate on an edge of adoor provided with a bore opening outwardly of said edge, comprising: abody provided at one end with a boss adapted to be received in saidbore, a pair of channel shaped cutters each provided with a pair ofparallel cutting edges, means for securing said cutters to said bodywith the cutting edges of said cutters coplanar and defining a rectanglecutting frame around said boss, said boss projecting from said bodysubstantially 'beyond the plane of said edges to guide the latter topredetermined positions relative to said bore, said means including apair of pointed elements extending outwardly of said body and adapted tobe embedded in said edge for defining the location of pointed screws forsecuring such faceplate to the door. 7

2. A mortising tool for use in installing a faceplate on an edge of adoor provided with a bore opening outwardly of said edge, comprising: abody provided at one end with a boss adapted to be received in saidbore, a pair of channel shaped cutters each provided with a pair ofparallel cutting edges, means for securing said cutters to said bodywith the cutting edges of said cuttercoplanar and defining a rectanglecutting frame around said boss, said boss projecting from said bodysubstantially beyond the plane of said edges to guide the latter to'predetermined positions relative to said bore, said means comprising apair of internally threaded sleeves passing 4 through said cutters and apair of pointed screws threadedly secured in said sleeves and extendingoutwardly of said body and adapted to be embeded in said edge fordefining the location of screws for securing such faceplate to'the door.

3. A mortising tool for use in installing a faceplate on an edge of adoor provided with a bore opening outwardly of said edge comprising: abody provided at one end with a boss adapted to bereceived in said boreand at its other end with a handle portion adapted to be struck by ahammer, a pair ofchannel shaped cutters centrally aperture'd to receivesaid boss therethrough and each provided with a pair of parallel cuttingedges, said cutters being removably-secured torsaidibody with saidcutting edges coplanar and defining a rectangular cutting frame, meansfor so 'securing'said cutters to said body comprising a pair ofsleeves'passing through said cutters and into said body, flanges on saidsleeves adapted to engage the outer one of said cutters,vand a pair ofpointed screws .threadedly secured within said sleeves and projectingoutwardly thereof and adapted to be embedded in said edge for definingthe'locatio'n of screws for securing such faceplate to the door.

4. A mortising tool for use in. installing a faceplate on an edge of adoor provided with a bore opening outwardly of said edge comprising: abody provided at one'end with an integral boss adapted to be received insaid bore, a pair of channel shaped cutters each provided with a pair ofparallel cutting edges, means for securing said cutters to said bodywith the cutting edges of said cutters coplanar and defining a cuttingframe around said boss, said'boss projecting 'from said-body-"sub'stantially beyond the plane of said e'dgesfto guide i the latterto predetermined positions relative to said bore,

saidf boss being noncircular in cross section and said cutters beingprovided with complementarily formed openings therein to receive saidboss therethrough to preto each other.

ventrotation of the cutters with relation vto the boss and 5." Amortising tool as defined in and by claim 4 wherein the boss hasopposite flate surfaces and the openings inthe cuttersare complementaryto the cross sectional shaped the boss.

References Cited in the file, of this patent UNITED STATES PATENTS

